actinometer vs measuring device

actinometer and measuring device both are nouns.

Word	Noun	Adjective	Verb	Adverb
actinometer	Yes	No	No	No
measuring device	Yes	No	No	No

As nouns, measuring device is a hypernym of actinometer; that is, measuring device is a word with a broader meaning than actinometer:

actinometer: an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of actinometer include measuring instrument, measuring system.

actinometer (noun)	measuring device (noun)
an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)	instrument that shows the extent or amount or quantity or degree of something